#!/bin/bash

file="${TMPDIR:-/tmp}/$SUDO_USER.became.$USER.$RANDOM.$$"
( builtin umask 077; echo "unset ENV POSIXLY_CORRECT; set +o posix" > "$file"; cat >> "$file"; echo "/bin/rm -f '$file'" >> "$file" )
exec </dev/tty env ENV="$file" POSIXLY_CORRECT=1 /bin/bash
exit 111